• Journal of Broadcast Engineering
• /
• v.8 no.4
• /
• pp.492-500
• /
• 2003

In this paper, we propose a new deinterlacing algorithm which is an edge dependent Interpolation (EDI) algorithm based on a horizontal edge pattern. Generally, a conventional EDI algorithm has a visually better performance than any other deinterlacing algorithm using one field. However, it produces unpleasant results due to the failure of estimating edge direction. In order to exactly detect edge direction, we use not only simple difference but also edge patterns. Experimental results indicate that the proposed algorithm outperforms conventional approaches with respect to both objective and subjective criteria. Index Terms I-to-P conversion, deinterlacing, edge dependent interpolation, edge pattern.

• Journal of Veterinary Clinics
• /
• v.33 no.5
• /
• pp.316-319
• /
• 2016

A 12-year-old thoroughbred mare with four days history of anorexia and high fever was submitted to the Equine Hospital. She failed to conceive in the following the breeding season in spring. In rectal palpation, mass could be palpable surrounding ovary. Because of the poor prognosis, full necropsy for mare was decided. The mass is located between right large and small colon, cranial to ovary using ultrasonography. Grossly, the mass was about $5{\times}3.5{\times}4cm$ in size, and the cut surface of mass showed brownish yellow in color with red-to orange granular areas Histopathologically, neoplastic cells were mixed with well differentiated spindle shape cells arranged in interlacing, interwoven pattern and poorly differentiated spindle cells. Neoplastic cells had abundant pink cytoplasm and bland and cigar-shaped nuclei with low mitotic figures. Many arteriole-like blood vessels with thick muscular wall were present throughout the mass. Masson's trichrome staining revealed muscle origin tumors in this case. Immunohistochemically, the neoplastic spindle cells showed positive reactions for smooth muscle actin and desmin. In our best knowledge, this is the first report of uterine angioleiomyoma in mare in Korea.

• Journal of Korean Academy of Oral and Maxillofacial Radiology
• /
• v.22 no.2
• /
• pp.367-373
• /
• 1992

The author observed a 35-year-old male patient who came to the Dental Infirmary of Kyungpook National University Hospital who had complained of gradual swelling on both side of the mandible for 15 years. As a result of careful analysis of clinical, radiological and histopathological findings, the authors diagnosed it as cementifying fibroma and obtained the results as follows: 1. In clinical examination, main clinical symptom was facial deformity due to gradual swelling on both side of the mandible. 2. In radiographic examination, radiolucent lesions with central radiopaque foci were seen on both mandibular body areas bilaterally, and cortical thinning and expansion of the mandibular body were seen buccolingually. And loss of lamina dura and root resortption of adjacent teeth were also seen. In histopathological examination, this lesion was composed of delicate interlacing collagen fibers interspersed by the fibroblasts and cementoblasts. And round or oval shaped basophilic masses of cementum-like tissue were observed in the connective tissue.

• Journal of Korea Game Society
• /
• v.9 no.4
• /
• pp.89-96
• /
• 2009

In general, the size of volume data is large since it has logical 3D structure so it takes long time to manipulate. Much work has been done to improve processing speed of volume data. In this paper, we propose a interlaced scanning volume rendering that reduce computation time by using temporal coherence with minimum loss of image quality. It renders a current frame by reusing information of previous frame. Conventional volume raycasting renders each frame by casting rays on every pixels. On the other hand, our methods divided an image into n-pixel blocks, then it casts a ray on a pixel of a block per each frames. Consequently, it generates an image by accumulating pixel values of previous n frames. The quality of rendered image of our method is better than that of simple screen space subsampling method since it uses afterimage effect of human cognitive system, and it is n-times faster that the previous one.

• Journal of Broadcast Engineering
• /
• v.9 no.1
• /
• pp.43-53
• /
• 2004

In this paper, we propose a robust deinterlacing algorithm which combines edge dependent interpolation (EDI) and global motion compensation (GMC). Generally, EDI algorithm shows a visually better performance than any other deinterlacing algorithm using one field. However, due to the restriction of information in one field, a high duality progressive image from Interlaced sources cannot be acquired by intrafield methods. On the contrary, since algorithms based on motion compensation make use of not only spatial information but also temporal information, they yield better results than those of using one field. However, performance of algorithms based on motion compensation depends on the performance of motion estimation. Hence, the proposed algorithm makes use of mixing process of EDI and GMC. In order to obtain the best result, an adaptive thresholding algorithm for detecting the failure of GMC is proposed. Experimental results indicate that the proposed algorithm outperforms the conventional approaches with respect to both objective and subjective criteria.

• Journal of Broadcast Engineering
• /
• v.15 no.6
• /
• pp.791-802
• /
• 2010

Recent prevalence of progressive scan display such as LCD TV demands the quality improvement of existing deinterlacing techniques that convert interlaced scan images including HDTV broadcasting to progressive scan images. In this paper, we proposea motion adaptive deinterlacing technique which can be used for spatial methods, temporal methods, and the spatial-temporal methods can be used for the deinterlacing techniques selectively based on the threshold values calculated by the statistics of motion in the video contents. We also propose an improved spatial deinterlacing technique that adaptively use M-ELA and DOI based on the slant of edges that are obtained by Sobel operation. The improved picture quality of the proposed algorithm is confirmed by objective and subjective quality tests on many test image sequences.

• Journal of the Institute of Electronics Engineers of Korea SP
• /
• v.39 no.4
• /
• pp.418-428
• /
• 2002

In this paper, we propose a motion-adaptive de-interlacing method using motion compensated interpolation. In a conventional motion compensated method, a simple pre-filter such as line averaging is applied to interpolate missing lines before the motion estimation. However, this method causes interpolation error because of inaccurate motion estimation and compensation. In the proposed method, EBMF(Edge Based Median Filter) as a pre-filter is applied, and new matching method, which uses two same-parity fields and opposite-parity field as references, is proposed. For further improvement, motion correction filter is proposed to reduce the interpolation error caused by incorrect motion. Simulation results show that the proposed method provides better performance than existing methods.

• Korean Journal of Childcare and Education
• /
• v.11 no.5
• /
• pp.261-292
• /
• 2015

The purpose of this study was to explain the process of meaning construction on children's happiness by mothers with young children. The study participants were 16 mothers with young children. The data were collected through the interviews which were conducted during 10 months from March, 2013 to December, 2013. The Data were analyzed according to a grounded theory methodology. The process of meaning construction on children's happiness by mothers included 4 stages, which are as follows. 'Following inseparated social desire and demands', 'Looking around my desire and children's happiness', 'Rearranging interlacing desire' and 'Going to find my children's happiness and my happiness'. And the stages were interacting mothers'time perspectives and diverse ecosystems. Based on the results, the study discussed the characters of interaction on time perspectives and parenting, and discussed influences of meaning construction on happiness.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.30 no.1
• /
• pp.10-14
• /
• 2003

Myofibroma is a rare spindle cell neoplasm that consists of myofibroblsasts. Although it was originally described as a multicentric tumor process affecting infants and young children, it is now recognized that most cases of the tumor are soliatary and that it can occur at any age. This case is a myofibroma involving the right mandibular body in a 9-year-old boy. Radiographic examination revealed a relatively well-demarcated radiolucent lesion surrounding the impacted right mandibular canine and first premolar crown. The histologic sections composed of interlacing bundles of spindle cells with tapered or blunt-ended nuclei admixed with a foci of hemangiopericytoma-like appearance. Immunohistochemical staining demonstrated a positive reaction to vimentin and smooth muscle actin, but they are negative for desmin and S-100. The presence of well circumscribed radiolucent solid lesion in children as observed in this case, differential diagnosis of myofibroma must be included. In this case, there was no recurrence 6 months after enucleation and eruption guide of the impacted tooth is ongoing now.

• Journal of Broadcast Engineering
• /
• v.16 no.5
• /
• pp.873-882
• /
• 2011

In this paper, we propose an efficient deinterlacing algorithm which interpolates the missing scan lines by weighted summing of the intra and the inter interpolation pixels according to the spatio-temporal variation. In the spatial interpolation, we adopt a new edge based spatial interpolation method which includes edge directional refinement. The conventional edge dependent interpolation algorithms are very sensitive to noise due to the failure of estimating edge direction. In order to exactly detect edge direction, our method first finds the edge directions around the pixel to be interpolated and then refines edge direction of the pixel using weighted maximun frequent filter. Futhermore, we improve the accuracy of motion detection by reducing the possibility of motion detection error using 3 tab median filter. In the final interpolation step, we adopt weighted sum of intra and inter interpolation pixels according to spatio-temporal variation ratio, thereby improving the quality in slow moving area. Simulation results show the efficacy of the proposed method with significant improvement over the previous methods in terms of the objective PSNR quality as well as the subjective image quality.